Dyfyniad APA

Shields. Unlocking V.O. Key Jr. University of Arkansas Press.

Dyfyniad Arddull Chicago

Shields. Unlocking V.O. Key Jr. University of Arkansas Press.

Dyfyniad MLA

Shields. Unlocking V.O. Key Jr. University of Arkansas Press.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.